智慧型無線感測監控系統平臺建構與其在土木結構診斷應用之研究-子計畫:無線壓電式結構局部損傷偵測監測器之研發(I)

Abstract

結構健康監測系統的目的是利用許多智慧感測器所組成的監測網路系統來長期監 控結構的狀態，其有賴於發展一個即時、低成本、高穩定度和先進的監測系統，以提供 結構在維持營運與修復時必要的資訊。因此，建立一個整合性的結構健康監測系統，結 合全域與局部結構健康監測來監測結構的健康狀態是目前重要的研究議題。本整合計畫 【智慧型無線感測監控系統平臺建構與其在土木結構診斷應用之研究】係延續96-99 年 整合計畫之研究成果，繼續研發新一代的智慧型感測模組與與監測網路。本研究為子計 畫四，規劃以三年來進行。第一年計畫著重於無線壓電式結構局部損傷偵測監測器之研 發與測試；第二年則將第一年之成果與全域監測模組結合於整合計畫研發之智慧型無線 監測網路中，在利用小型振動台與縮尺寸實驗構架進行可靠度與強健度評估；第三年計 畫將整合計畫研發之監測網路系統藉由一八層樓實驗構架於國家地震工程研究中心 (NCREE)之震動台來驗證本智慧型無線監測網路系統於房屋結構健康診斷之應用。另外， 亦將本監測系統建置於一座橋梁上進行監測，並將採用粒子群優化演算法(Particle Swarm Optimization, PSO)來探討監測網路中感測節點最佳化佈設的規劃，以期降低成本， 提高系統的效能與強健性。

The application of structural health monitoring (SHM) of buildings and civil infrastructures has been increasingly more important recently and has received considerable interest in the last decade. The aims of an SHM system are to monitor health condition of structures long term using smart sensor system, provide any information for maintaining or repairing the structure if need, and generate warning before it collapse unexpectedly. Hence, a low-cost, real-time monitoring system with high stability and robustness is required. For that reason, to develop a real time monitoring system which integrates global damage detection and local damage detection is essential. Based on the work achieved in a prior integrated project in 96-99, the aim of the main research project of this study is to build up an intelligent wireless structure health monitoring platform for civil infrastructural structures. This study is a three-year sub-project of the main research project. The goal of the first year project will focus on developing and evaluating piezoelectric impedance-based wireless sensor modules for the purpose of local damage detection of structures. Following, the feasibility and robustness of the proposed integrated SHM modules and the intelligent wireless monitoring system will be assessed using a small-scaled steel frame and experimentally generated different damage scenarios by subjecting this structure various base excitations via shaking table tests. Finally, the proposed intelligent wireless SHM system was developed and employed experimentally. The integrated local/global sensing nodes were deployed on a steel frame model to monitor health status. The experimental model was a ¼-scale eight-storey steel structure that was designed by the National Center for Research on Earthquake Engineering (NCREE). Also, a field test of SHM for bridges will be scheduled. A PSO algorithm will be employed to optimize the deployed location of sensor nodes in the bridge to increase the performance and robust as well as reduce the cost for the system.